JP2012045527A - Deodorization treatment device and deodorization treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorization treatment device and a deodorization treatment method attaining deodorization treatment while maintaining VOC removing capability of a concentrator by efficiently discharging to the outside of a system dust of about several μm to several tens μm in particle size deposited on a hole or an end face of a porous material in the concentrator.SOLUTION: The deodorization treatment device includes: the concentrator having the porous material, adsorbing a VOC-containing gas into the porous material, passing a purified gas, and desorbing the adsorbed gas; and a deodorizing and burning device burning the VOC-containing desorbed gas desorbed from the concentrator. The concentrator includes an air blow type or air suction type dust removing means for removing the dust deposited on the porous material.

Description

  The present invention relates to a deodorization treatment apparatus and a deodorization treatment method for deodorizing a gas containing VOC (Volatile Organic Compounds).

Volatile organic compounds (VOC) used in coating lines and the like are required to suppress emissions by preventing air pollution. As a method for suppressing emission, a method of burning a gas containing VOC (hereinafter referred to as “VOC-containing gas”) at a high temperature of about 800 to 900 ° C. and decomposing it into H ₂ O and CO ₂ is generally employed.

  Further, when the VOC concentration in the VOC-containing gas is low (about 1000 ppmC), in order to reduce the size of the deodorizing combustion apparatus, a method of adsorbing and concentrating the VOC in advance and reducing the volume is used for combustion. As an adsorption concentrating device used for adsorbing and concentrating VOCs, a rotary adsorption concentrating device having at least an adsorbing part and a desorbing part is generally used (for example, Patent Documents 1 and 2).

FIG. 2 shows a flow chart of an example of a conventional VOC-containing gas deodorization treatment device in which a rotary adsorption concentrating device and a deodorization combustion device are combined.
The treated VOC-containing gas sent to the adsorption unit 102a of the rotary adsorption / concentration device 102 through the VOC-containing gas inflow pipe 103 using the suction fan 101 is the gas purified by adsorbing the VOC to the adsorption unit 102a. Is released to the outside. The VOCs adsorbed and concentrated on the adsorption unit 102a are continuously moved from the adsorption unit 102a to the desorption unit 102b by rotation, heated by the heat exchanger 110b and the heating means 104, and supplied using the suction fan 106. Desorbed by working gas. The desorbed concentrated gas containing the desorbed VOC is vented to the deodorizing combustion apparatus 110 through the suction fan 108. This desorbed and concentrated gas is preheated by the heat exchanger 110c of the deodorizing combustion apparatus 110, purified by oxidative decomposition (combustion) of VOC in the concentrated gas in the combustion chamber 110a, and exhausted through the heat exchanger 110b. .

Various rotary adsorption / concentration devices such as a honeycomb type adsorption / concentration device or a fluid type adsorption / concentration device are provided. Of these, the honeycomb type adsorption / concentration device is generally used because of the size and operability of the device. Has been.
As shown in FIG. 3, the honeycomb type adsorbing and concentrating apparatus is a honeycomb having a large number of holes P formed by stacking an activated material adsorbing material such as activated carbon and zeolite adsorbing VOC into a corrugated sheet and an unprocessed material. The suction rotor 102A is used.
In the rotary adsorption concentrator shown in FIG. 3, the VOC-containing gas that is the gas to be treated is passed through the adsorption rotor 102A, the VOC is adsorbed in the numerous holes P of the adsorption unit, and only the purified gas is exhausted to the outside. Is done. The outside air taken in as a regeneration (desorption) gas is heated by a heating means, supplied to the desorption portion of the adsorption rotor 102A via the supply duct 111, VOC is separated from the adsorption rotor 102A, and discharged as a concentrated gas from the exhaust duct 113 To do.

Thus, an adsorption rotor made of a porous material such as activated carbon or zeolite is incorporated inside the rotary adsorption concentrator, and when a VOC-containing gas is passed through the porous material at room temperature, VOC is captured in the holes P. Exhaust gas having a reduced VOC concentration is directly diffused into the atmosphere (for example, Patent Document 3).
The porous material has a characteristic of releasing the trapped VOC when exposed to a temperature of about 150 to 200 ° C. As described above, the adsorption rotor is partitioned by separating the adsorption portion 102a that is the passage range of the VOC-containing gas (VOC capture range) and the desorption portion 102b that is the range that is exposed to a temperature of about 150 to 200 ° C. (VOC release range). By passing the VOC-containing gas while rotating the rotor, the VOC can be adsorbed, and then the adsorption-concentrated VOC can be desorbed and taken out by passing hot air. Then, the concentration of VOC can be controlled by adjusting the ratio between the VOC capture time and the release time and the temperature of the VOC release gas (high temperature air), and the VOC release to the atmosphere can be suppressed.

JP 2002-248317 A JP 2001-310111 A JP-A-10-244125

  The VOC-containing gas is generated in a process of producing or consuming an organic compound, but there may be cases where impurities other than VOC such as rust prevention and preservatives are included in addition to the organic compound, for example, as in a paint. In this case, they may accumulate as impurities in the pores P of the porous material in the concentrating device or the end faces 102c thereof, or close the pores P, thereby reducing the concentration function (adsorption efficiency). Therefore, as shown in FIG. 4, the pre-activated carbon filter 113 and the roll filter 114 are provided in the entrance side of the concentration apparatus. These filters can remove large impurities, but fine impurities (hereinafter referred to as “dust”) having a particle size of about several μm to several tens of μm pass through the eyes of the filter. If such a state continues for a long time, dust accumulates on the surface of the porous material, plugs the pores, and lowers the concentration function. As a result, sufficient VOC concentration cannot be performed, and the reduction of VOCs released into the atmosphere is insufficient.

  The present invention has been made in view of the above circumstances, and efficiently discharges dust having a particle size of about several μm to several tens of μm deposited on the pores of the porous material inside the concentrator or the end face thereof to the outside of the system. Thus, an object of the present invention is to provide a deodorization treatment apparatus and a deodorization treatment method that enable deodorization treatment while maintaining the VOC removal ability of the concentrator or recovering the reduced ability.

（６）多孔物質を有してなり該多孔物質内に被処理ＶＯＣ含有ガスを吸着し、浄化したガスを通過させると共に吸着されたガスを脱着できる濃縮装置に、被処理ＶＯＣ含有ガスを通気して吸着させた吸着ガスを脱着してその脱着されたＶＯＣを含む脱着ガスを脱臭燃焼装置で燃焼して脱臭する脱臭処理方法において、エアーブロー式又はエアー吸引式で前記多孔物質に気体を流通させることによって前記多孔物質に堆積されたダストを除去するダスト除去工程を含むことを特徴とする脱臭処理方法。
（７）前記ダスト除去工程を、前記濃縮装置にＶＯＣ含有ガスを吸引する吸引手段の吸引力を増大することによって行うことを特徴とする（６）に記載の脱臭処理方法。
（８）前記流通をさせる気体として大気を用いることを特徴とする（６）又は（７）のいずれかに記載の脱臭処理方法。 The gist of the present invention for solving the above problems is as follows.
(1) Containing a porous material, adsorbing a VOC-containing gas in the porous material, allowing the purified gas to pass through, and desorbing the adsorbed gas, and the VOC desorbed from the concentrating device A deodorizing combustion device for burning the contained desorption gas, and the concentrating device comprises an air blow type or air suction type dust removing means for removing dust deposited on the porous material. A deodorizing treatment device.
(2) The inlet side of the concentrating device includes an air suction port for sucking air, and a switching unit that switches between suction of VOC-containing gas and air suction into the concentrator. The deodorizing apparatus according to (1).
(3) The deodorizing apparatus according to any one of (1) and (2), further comprising a first activation control unit that periodically outputs an activation signal to the dust removing unit.
(4) The deodorizing apparatus according to any one of (1) to (3), wherein a dust collecting device is provided on the outlet side of the purified gas of the concentrating device.
(5) Each of the inlet side of the concentrator and the outlet side of the purified gas is provided with an inlet side concentration meter and an outlet side concentration meter for measuring the VOC concentration of the gas, and the inlet side measured by the inlet side concentration meter is provided. Second activation control means for calculating VOC removal efficiency from the side VOC concentration and the outlet VOC concentration measured by the outlet concentration meter, and outputting a start signal to the dust removing means in accordance with the value of the VOC removal efficiency A deodorizing apparatus according to any one of (1) to (4), wherein:

(6) The VOC-containing gas to be treated is passed through a concentrating device that has a porous material, adsorbs the treated VOC-containing gas in the porous material, allows the purified gas to pass through, and desorbs the adsorbed gas. In the deodorizing treatment method in which the adsorbed gas adsorbed and desorbed and the desorbed gas containing the desorbed VOC is burned with a deodorizing combustion device and deodorized, the gas is circulated through the porous material by air blow type or air suction type A deodorizing treatment method comprising a dust removing step of removing dust deposited on the porous material.
(7) The deodorizing treatment method according to (6), wherein the dust removing step is performed by increasing a suction force of a suction unit that sucks the VOC-containing gas into the concentrator.
(8) The deodorizing method according to any one of (6) and (7), characterized in that the atmosphere is used as the gas for the circulation.

  According to the deodorizing apparatus of the present invention, the concentrating device is configured to include air blow type or air suction type dust removing means for removing dust accumulated in the porous material, so that it is regular or irregular. Since the VOC removal capability can be maintained or the reduced capability can be recovered by driving the dust removal means to remove the dust that hinders the adsorption of the VOC, a highly efficient deodorization treatment can be performed, and the concentration device By extending the service life, the equipment cost can be reduced and the number of maintenance can be reduced.

  According to the deodorizing apparatus of the present invention, the inlet side of the concentrating device is provided with an air suction port for sucking the air, and switching means for switching between sucking the VOC-containing gas into the concentrating device and sucking the air. With this configuration, the operation of the VOC-containing gas generation process is temporarily interrupted, and the switching means on the inlet side of the concentrator is simply set to the atmosphere suction side, so that unprocessed VOC is not discharged out of the system. The dust deposited on the porous material in the concentrator can be discharged.

  According to the deodorizing apparatus of the present invention, the dust removal device is provided on the outlet side of the purified gas of the concentrating device, thereby removing the removed dust without providing facilities for discharging the dust out of the system. Dust can be collected.

  According to the deodorization processing device of the present invention, the VOC removal capability of the concentrator is periodically recovered by adopting the configuration including the first activation control unit that periodically outputs the activation signal to the dust removing unit. Highly efficient deodorizing treatment can be performed.

  According to the deodorizing apparatus of the present invention, the VOC removal efficiency is calculated from the incoming VOC concentration measured by the incoming concentration meter and the outgoing VOC concentration measured by the outgoing concentration meter, and the value of the VOC removal efficiency is calculated. Accordingly, the deodorizing process can be performed with the adsorption concentration capacity of the concentrating device of a certain level or more by providing the second activation control unit that outputs the activation signal to the dust removing unit.

According to the deodorizing treatment method of the present invention, highly efficient deodorizing treatment work can be performed, and the equipment cost can be reduced and the number of maintenance can be reduced by extending the life of the concentrator.
According to the deodorization treatment method of the present invention, the dust removal step is performed by increasing the suction force of the suction means for sucking the VOC-containing gas into the concentrator, thereby using the suction means of the deodorization treatment apparatus. As a result, the dust can be removed from the concentrator.
According to the deodorizing treatment method of the present invention, the dust removal operation of the concentrating device using a clean gas can be performed by using the atmosphere as the gas for circulating the porous material.

It is a flowchart of the deodorizing processing apparatus which is one Embodiment to which this invention is applied. It is a flowchart of an example of the conventional deodorizing processing apparatus. It is a schematic perspective view of the conventional honeycomb adsorption rotor. It is a schematic perspective view of the conventional rotary adsorption concentration apparatus.

  Hereinafter, a deodorizing apparatus and a deodorizing method that are embodiments to which the present invention is applied will be described in detail with reference to FIG.

  A deodorizing apparatus according to an embodiment to which the present invention is applied includes a VOC-containing gas inflow pipe 3 through which a VOC-containing gas sent to a concentrating device 2 by an intake fan (suction means) 1 flows, and a VOC-containing gas adsorbing portion 2a. And the desorption gas heated by the heat exchanger 10b and the heating means 4 in order to desorb the VOC adsorbed by the concentrating device 2 and the suction device. 6 is used to supply the desorption gas supply means 7 for supplying to the desorption part 2b of the concentration device 2 and the desorption concentration gas containing the VOC desorbed from the concentration device 2 to the deodorization combustion device 10 using the suction fan 8. A deodorizing combustion apparatus 10 including a heat exchanger 10c that burns the desorbed and concentrated gas in the gas inflow pipe 9 and the combustion chamber 10a and exchanges heat between the desorbed and concentrated gas and the burned gas, and a concentrating apparatus. The suction port 11 for sucking the atmosphere provided on the inlet side of the gas and the switching means A1 for switching between the suction of the VOC-containing gas to the concentration device and the suction of the atmosphere, and the purified gas outlet side of the concentration device 2 VOC concentration of the gas provided on each of the dust collecting device 12 provided and the switching means A2 for switching between emission to the outside and the dust collecting device, and the inlet side of the concentrating device 2 and the outlet side of the purified gas. An input side densitometer B1 and an output side densitometer B2 to be measured, and a control means 13 having a first start control means and a second start control means are provided.

The first activation control means periodically outputs an activation signal that serves as a trigger for increasing the rotational speed of the suction fan 1, and at the same time, switches the switching means A1 from the suction of the VOC-containing gas to the suction of the atmosphere. The switching means A2 can be switched from the emission outside the system to the dust recovery device.
As a result, the untreated VOC can be removed without removing the porous material dust in the concentrating device without being discharged out of the system, and can be recovered without providing facilities for discharging the removed dust out of the system. In addition, the VOC removal capability of the concentrator can be restored.

The second activation control means calculates the VOC removal efficiency from the incoming VOC concentration measured by the incoming side densitometer B1 and the outgoing VOC concentration measured by the outgoing side densitometer B2, and obtains the value of the VOC removal efficiency. In response to this, a start signal is output as a trigger to increase the rotational speed of the suction fan 1, and at the same time, the switching means A1 is switched from the suction of the VOC-containing gas to the suction of the atmosphere, and the switching means A2 is moved to the outside of the system. It is possible to switch from emission to a dust recovery device.
As a result, the deodorizing process can be performed using the concentrator with a predetermined VOC removal capability or higher.

  The control means 13 includes a first activation control means and a second activation control means, and can operate by selecting one of the first activation control means and the second activation control means automatically or manually.

  In the present embodiment, the suction fan 1 also serves as a dust removing unit and serves as an air suction type dust removing unit. However, the dust removing unit may be provided separately or may be an air blow type. In this embodiment, the suction fan 1 is on the inlet side of the concentrator 2, but may be on the outlet side of the concentrator 2.

  In the present embodiment, the atmosphere is taken in from outside the system to remove dust. However, any clean gas may be used, and the purified gas from the concentrator may be used.

  In the present embodiment, the switching means A1 and A2 are automatically switched using the control means 13, but may be manually configured.

It is preferable that the VOC removal efficiency is displayed from the incoming VOC concentration measured by the incoming densitometer B1 and the outgoing VOC concentration measured by the outgoing side densitometer B2.
This is because the effect of carrying out the dust removal process can be confirmed, and it can also be used as a guide for maintenance of the concentrator.
The deodorization combustion apparatus may be a heat storage type, and may use a heat storage body instead of the heat exchanger 10b.

  When the dust removing means is started periodically, it depends on the operating conditions, but for example, when used under the condition of continuous operation for 8 hours / day in the coating line, it is preferable to operate every 1 to 3 days.

  When the dust removing unit is activated according to the VOC removal efficiency, it is preferably activated when the dust removing unit is reduced to 90% or less.

  The removal of dust can be confirmed with a commercially available magnifier.

In the deodorizing treatment apparatus shown in FIG. 1, the VOC-containing gas that is the gas to be treated introduced by the suction fan (suction means) 1 through the switching means A1 is sent to the adsorption unit 2a of the concentrating device 2, and VOC is The adsorbed and purified gas is discharged through the switching means A2.
During operation or stoppage of the deodorization treatment device, concentration is performed regularly or irregularly by the input side concentration meter B1 installed on the entry side of the concentration device 2 and the output side concentration meter B2 installed on the exit side. The inlet and outlet VOC concentrations of the apparatus 2 are measured, and the measured inlet and outlet VOC concentrations are sent to the second startup control means, and the second startup control means calculates the VOC removal efficiency. Then, an activation signal is output to the dust removing means according to the value of the VOC removal efficiency. The value of the VOC removal efficiency that outputs the start signal to the dust removing means can be set to a predetermined value in advance, and it is preferable that the value can be set so as to be changed depending on the operation state, for example, the continuous operation time.
The control means 13 includes a first start control means for outputting a start signal that serves as a trigger for periodically increasing the rotational speed of the suction fan 1, and performs a dust removal step without measuring the VOC concentration. Also good.

  In the deodorizing apparatus shown in FIG. 1, the suction fan (suction means) 1 is used as the dust removing means, and the dust accumulated in the porous material of the concentrator is increased by introducing the suction amount more than that during normal operation. The dust removal step is performed by blowing off with the wind pressure.

  When the control means 13 selects the second activation control means and the deodorizing apparatus is operated, a trigger for increasing the rotational speed of the suction fan 1 from the second activation control means when the VOC removal efficiency is below a predetermined value. The switching means A1 is switched from suction of the VOC-containing gas to the suction of the atmosphere, and the switching means A2 is switched from emission outside the system to the dust recovery device, and the dust removal step Is done.

Table 1 shows the change in the VOC removal efficiency [%] before and after the continuous operation of the deodorizing apparatus including the dust removing process using the deodorizing apparatus having the configuration shown in FIG.
Both are examples when the deodorizing apparatus is operated continuously for 24 hours a day for one month in the painting line, and shows the VOC removal efficiency before and after the continuous operation for one month.
Here, the operation of “24 hours a day” in Examples 1 and 2 of the present invention means “an operation cycle of 8 hours” in which a dust removal step is performed for 0.5 hours after normal operation for 7.5 hours. This is an operation that performs three sets.
In addition, a comparative example is an example of the prior art which performed a continuous operation for 24 hours a day for one month without performing a dust removal process.
In Table 1, the VOC removal efficiency of “Before continuous operation” and “After continuous operation” of Example 3 is the same as that of the comparative example, after 24 hours a day for one month and one month of continuous operation. And VOC removal efficiency before and after the air blow.

Example 1 is an example in which the 0.5 hour dust removal step performed in the “8 hour operation cycle” was performed with the suction amount (rotational speed) of the suction fan 1 being 1.5 times that of normal operation.
The second embodiment is an example in which the dust removal process for 0.5 hours performed in the “8-hour operation cycle” is performed with the suction amount (rotation speed) of the suction fan 1 being twice that of the normal operation.
Examples 1 and 2 are examples in which a dust removing process is performed by an air suction method.

In Example 3, after carrying out continuous operation for 24 hours a day for 1 month as in the comparative example, unlike the comparative example, the dust removal step was performed by carrying out blowing for 1 hour with high-pressure air of 0.6 MPa. It is an example.
Example 3 is an example in which a dust removal step is performed by an air blow type.

  In the conventional case where the dust removal process is not performed (comparative example), the VOC removal efficiency was 95% before the continuous operation for one month, but it became 70% after the continuous operation for one month, and the VOC removal efficiency was greatly increased. Declined.

  On the other hand, in Example 1, the VOC removal efficiency, which was 95% before one month of continuous operation, was only slightly lowered to 91.5% after one month of continuous operation. In this way, the decrease in VOC removal efficiency was greatly suppressed because the 0.5 hour dust removal process performed in the “8 hour operation cycle” was performed while the suction amount (rotation speed) of the suction fan 1 was normally operated. This is the effect of removing dust accumulated on the pores of the porous material of the concentrating device or on the end face thereof by executing as 1.5 times as much.

  Further, in Example 2, the VOC removal efficiency, which was 95% before one month of continuous operation, is maintained at 92% even after one month of continuous operation, and the degree of decrease in VOC removal efficiency is further suppressed. It was.

  Further, in the same manner as in the comparative example, in Example 3, the VOC removal efficiency, which decreased to 70% after continuous operation for 24 hours a day for 1 month, recovered to 90% after air blowing.

DESCRIPTION OF SYMBOLS 1 Suction fan 2 Concentrator 3 VOC containing gas inflow pipe 4 Heating means 6 Suction fan 7 Desorption gas supply means 8 Suction fan 9 Desorption concentrated gas inflow pipe 10 Deodorizing combustion apparatus 10a Combustion chamber 10b Heat exchanger 10c Heat exchanger 11 Atmosphere Suction port 12 Dust collection device 13 Control means A1 switching means A2 switching means B1 Inlet concentration meter B2 Outlet concentration meter

（５）多孔物質を有してなり、該多孔物質内にＶＯＣ含有ガスを吸着し、浄化したガスを通過させると共に、吸着されたガスを脱着できる濃縮装置と、前記濃縮装置から脱着されたＶＯＣ含有脱着ガスを燃焼する脱臭燃焼装置と、を具備し、前記濃縮装置が、前記多孔物質に堆積されたダストを除去するための、エアーブロー式又はエアー吸引式のダスト除去手段を備え、前記濃縮装置の上流側であってかつ被処理ガスの入側、及び、前記濃縮装置の下流側であってかつ浄化したガスの出側のそれぞれに、ガスのＶＯＣ濃度を測定する入側濃度計と出側濃度計とを備え、前記入側濃度計で測定された入側ＶＯＣ濃度と前記出側濃度計で測定された出側ＶＯＣ濃度とからＶＯＣ除去効率を計算し、そのＶＯＣ除去効率の値に応じて前記ダスト除去手段に起動信号を出力する第２起動制御手段を備えたことを特徴とする脱臭処理装置。
ここで、

（６）前記濃縮装置の上流側であってかつ被処理ガスの入側に、大気を吸引するための大気吸引口と、前記濃縮装置へのＶＯＣ含有ガスの吸引と大気の吸引とを切り替える切替手段と、を備えたことを特徴とする（５）に記載の脱臭処理装置。
（７）前記濃縮装置の下流側であってかつ浄化したガスの出側に、ダスト回収装置を備えたことを特徴とする（５）又は（６）のいずれかに記載の脱臭処理装置。
（８）多孔物質を有してなり該多孔物質内に被処理ＶＯＣ含有ガスを吸着し、浄化したガスを通過させると共に吸着されたガスを脱着できる濃縮装置に、被処理ＶＯＣ含有ガスを通気して吸着させた吸着ガスを脱着してその脱着されたＶＯＣを含む脱着ガスを脱臭燃焼装置で燃焼して脱臭する脱臭処理方法において、エアーブロー式又はエアー吸引式で前記多孔物質に気体を流通させることによって前記多孔物質に堆積されたダストを除去するダスト除去工程を含み、前記ダスト除去工程を、前記濃縮装置にＶＯＣ含有ガスを吸引する吸引手段の吸引力を増大することによって行うことを特徴とする脱臭処理方法。
（９）前記流通をさせる気体として大気を用いることを特徴とする（８）に記載の脱臭処理方法。 The gist of the present invention for solving the above problems is as follows.
(1) Containing a porous material, adsorbing a VOC-containing gas in the porous material, allowing the purified gas to pass through, and desorbing the adsorbed gas, and the VOC desorbed from the concentrating device A deodorizing and burning device for burning the contained desorbing gas, wherein the concentrating device comprises air blow type or air suction type dust removing means for removing dust deposited on the porous material, and the dust A deodorizing apparatus comprising first activation control means for periodically outputting an activation signal to the removing means .
(2) On the upstream side of the concentrating device and on the inlet side of the gas to be processed , switching to switch between an air suction port for sucking air and suction of VOC-containing gas to the concentrating device and air suction And a deodorizing apparatus according to (1).
(3) The deodorizing apparatus according to any one of (1) and (2) , wherein a dust collecting device is provided on the downstream side of the concentrating device and on the outlet side of the purified gas.
(4) the A upstream of the concentrating device and the inlet side of the gas to be treated, and, in each of a downstream and clarified outlet side of the gas in the concentrator, the input for measuring the VOC concentration of the gas A VOC removal efficiency is calculated from the incoming VOC concentration measured by the incoming side densitometer and the outgoing VOC concentration measured by the outgoing side densitometer. The deodorizing apparatus according to any one of (1) to (3) , further comprising second activation control means for outputting an activation signal to the dust removing means in accordance with a value of removal efficiency;
here,

(5) A concentrating device comprising a porous material, adsorbing a VOC-containing gas in the porous material, allowing the purified gas to pass therethrough, and desorbing the adsorbed gas, and a VOC desorbed from the concentrating device A deodorizing combustion device for burning the contained desorption gas, and the concentration device includes an air blow type or air suction type dust removing means for removing dust deposited on the porous material, and the concentration An inlet side concentration meter and an outlet side for measuring the VOC concentration of the gas on the upstream side of the apparatus and on the inlet side of the gas to be treated and on the downstream side of the concentrator and on the outlet side of the purified gas, respectively. A VOC removal efficiency is calculated from the incoming VOC concentration measured by the incoming side densitometer and the outgoing VOC concentration measured by the outgoing side densitometer, and the value of the VOC removal efficiency is obtained. Depending on the dust removal Deodorization apparatus comprising the second activation control means for outputting an activation signal to the means.
here,

(6) On the upstream side of the concentrating device and on the inlet side of the gas to be processed, switching between the air suction port for sucking the atmosphere and the suction of the VOC-containing gas into the concentrating device and the suction of the air And a deodorizing apparatus according to (5).
(7) The deodorizing apparatus according to any one of (5) and (6), wherein a dust collecting device is provided on the downstream side of the concentrating device and on the outlet side of the purified gas.
(8) The VOC-containing gas to be treated is passed through a concentrating device that has a porous material, adsorbs the treated VOC-containing gas in the porous material, allows the purified gas to pass through, and desorbs the adsorbed gas. In the deodorizing treatment method in which the adsorbed gas adsorbed and desorbed and the desorbed gas containing the desorbed VOC is burned with a deodorizing combustion device and deodorized, the gas is circulated through the porous material by air blow type or air suction type characterized in that by the porous material deposited was seen including a dust removing step of removing the dust, the dust removing process, increasing the suction force of the suction means for sucking the VOC-containing gas to the concentrator by Deodorizing treatment method.
(9) The deodorizing treatment method according to ( 8 ), wherein air is used as the gas for circulation.

Claims (8)

A concentrating device comprising a porous material, adsorbing a VOC-containing gas in the porous material, allowing the purified gas to pass through, and desorbing the adsorbed gas;
A deodorization combustion device for burning the VOC-containing desorption gas desorbed from the concentration device,
The deodorizing apparatus according to claim 1, wherein the concentrating device comprises an air blow type or air suction type dust removing means for removing dust accumulated on the porous material.   The inlet side of the concentrating device is provided with an air suction port for sucking air, and switching means for switching between suction of VOC-containing gas into the concentrating device and suction of air. The deodorization processing apparatus according to 1.   The deodorization processing apparatus according to claim 1, further comprising a first activation control unit that periodically outputs an activation signal to the dust removing unit.   The deodorizing apparatus according to any one of claims 1 to 3, further comprising a dust collecting device on a gas outlet side of the purified gas from the concentrating device. Each of the inlet side of the concentrator and the outlet side of the purified gas is provided with an inlet side concentration meter and an outlet side concentration meter for measuring the VOC concentration of the gas,
The VOC removal efficiency is calculated from the input side VOC concentration measured by the entry side densitometer and the exit side VOC concentration measured by the exit side densitometer, and the dust removal means is applied according to the value of the VOC removal efficiency. The deodorization processing apparatus according to any one of claims 1 to 4, further comprising second activation control means for outputting an activation signal.
here,

The VOC-containing gas to be treated is adsorbed by aeration in a concentrating device that has a porous material and adsorbs the VOC-containing gas to be treated in the porous material, allows the purified gas to pass through and desorbs the adsorbed gas. In the deodorizing treatment method, the desorbed gas is desorbed, and the desorbed gas containing the desorbed VOC is burned with a deodorizing combustion device to deodorize.
A deodorizing treatment method comprising a dust removing step of removing dust deposited on the porous material by circulating a gas through the porous material by an air blow type or an air suction type.   The deodorizing method according to claim 6, wherein the dust removing step is performed by increasing a suction force of a suction unit that sucks the VOC-containing gas into the concentrator.   The deodorizing treatment method according to claim 6, wherein air is used as the gas for circulation.

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